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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file gai_strerror.c
* gai_strerror() returns an error message corresponding to an
* error code returned by getaddrinfo() and getnameinfo(). The following error
* codes and their meaning are defined in
* \link netdb.h include/irs/netdb.h.\endlink
* This implementation is almost an exact copy of lwres/gai_sterror.c except
* that it catches up the latest API standard, RFC3493.
*
* \li #EAI_ADDRFAMILY address family for hostname not supported
* \li #EAI_AGAIN temporary failure in name resolution
* \li #EAI_BADFLAGS invalid value for ai_flags
* \li #EAI_FAIL non-recoverable failure in name resolution
* \li #EAI_FAMILY ai_family not supported
* \li #EAI_MEMORY memory allocation failure
* \li #EAI_NODATA no address associated with hostname (obsoleted in RFC3493)
* \li #EAI_NONAME hostname nor servname provided, or not known
* \li #EAI_SERVICE servname not supported for ai_socktype
* \li #EAI_SOCKTYPE ai_socktype not supported
* \li #EAI_SYSTEM system error returned in errno
* \li #EAI_BADHINTS Invalid value for hints (non-standard)
* \li #EAI_PROTOCOL Resolved protocol is unknown (non-standard)
* \li #EAI_OVERFLOW Argument buffer overflow
* \li #EAI_INSECUREDATA Insecure Data (experimental)
*
* The message invalid error code is returned if ecode is out of range.
*
* ai_flags, ai_family and ai_socktype are elements of the struct
* addrinfo used by lwres_getaddrinfo().
*
* \section gai_strerror_see See Also
*
* strerror(), getaddrinfo(), getnameinfo(), RFC3493.
*/
#include <isc/net.h>
#include <irs/netdb.h>
/*% Text of error messages. */
static const char *gai_messages[] = { "no error",
"address family for hostname not "
"supported",
"temporary failure in name resolution",
"invalid value for ai_flags",
"non-recoverable failure in name "
"resolution",
"ai_family not supported",
"memory allocation failure",
"no address associated with hostname",
"hostname nor servname provided, or not "
"known",
"servname not supported for ai_socktype",
"ai_socktype not supported",
"system error returned in errno",
"bad hints",
"bad protocol",
"argument buffer overflow",
"insecure data provided" };
/*%
* Returns an error message corresponding to an error code returned by
* getaddrinfo() and getnameinfo()
*/
#if defined _WIN32
char *
#else /* if defined _WIN32 */
const char *
#endif /* if defined _WIN32 */
gai_strerror(int ecode) {
union {
const char *const_ptr;
char *deconst_ptr;
} ptr;
if ((ecode < 0) ||
(ecode >= (int)(sizeof(gai_messages) / sizeof(*gai_messages))))
{
ptr.const_ptr = "invalid error code";
} else {
ptr.const_ptr = gai_messages[ecode];
}
return (ptr.deconst_ptr);
}
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